package forGame;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

//動態(tài)效果
public class Demo_1 extends JFrame{
 //背景
 private BufferedImage bufferedImage;
 //窗體大小
 private int width;
 private int height;
 //要繪制的動態(tài)照片數(shù)組
 private BufferedImage[] images = new BufferedImage[4];
 //要繪制動態(tài)圖中的那張
 private BufferedImage image;

 //初始化
 {
  if(bufferedImage == null){
   try {
    bufferedImage = ImageIO.read(new File("src\\image\\背景.png"));
    for(int i = 1;i < images.length + 1;i ++)
     images[i - 1] = ImageIO.read(new File("src\\image\\大飛機(jī)爆炸" + i + ".png"));
   } catch (IOException e) {
    e.printStackTrace();
   }
  }
  width = bufferedImage.getWidth();
  height = bufferedImage.getHeight();
  image = images[0];
 }

 public Demo_1(){
  super("動態(tài)測試");
  //設(shè)置窗口
  setSize(width,height);
  setLocationRelativeTo(null);
  setResizable(false);
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  setVisible(true);
  //啟動線程
  MyThread myThread = new MyThread();
  myThread.start();
 }

 //雙緩沖繪制解決圖片閃爍問題
 @Override
 public void paint(Graphics g) {
  Image image = this.createImage(width,height);
  Graphics gImage = image.getGraphics();
  gImage.setColor(gImage.getColor());
  gImage.fillRect(0,0,width,height);
  super.paint(gImage);

  //繪制背景
  gImage.drawImage(bufferedImage,0 ,0 ,null );
  //繪制動態(tài)圖片
  gImage.drawImage(this.image,0 ,100 ,null );

  //最后繪制緩沖后的圖片
  g.drawImage(image,0 ,0 , null);
 }

 private int num = 0;//images數(shù)組內(nèi)圖片索引
 //線程內(nèi)部類
 private class MyThread extends Thread{
  @Override
  public void run() {
   while(true) {
    if(num <= 3) {
     image = images[num ++];
    }
    else
     num = 0;
    repaint();
    try {
     sleep(100);//每隔100毫秒重繪一次
    } catch (InterruptedException e) {
     e.printStackTrace();
    }
   }
  }
 }

 public static void main(String[] args) {
  new Demo_1();
 }
}